A piece of stone m=5kg is attached to a string with length r=80 cm and is rotating in a VERTICAL circular path with constant speed of v=10m/s
a) draw a figure, show forces acting on the stone when it is on the highest and lowest positions. (Don't forget the gravity)
b) draw a free body diagram for each of the two situations
c) use the "radial" Newton's law to find the tension in the string at each of these situations